九年级英语13单元3b作文怎么写,

ut my friend tried it and said it did not work.it made my friend very angry,last week i bought a box of toothpaste,because it says it wll make your teeth more and more white,but when i got back home i found it tastes terrible.but there is also some advertisements tell the truth,like beauty cream it works really well it makes skin really soft !i like it very much!so i think we should not believe everything we read